The invention discloses a charging method and device for a power FTTH (fiber to the home) service, which are based on REST API. The charging method comprises the steps of acquiring a charging request message from a charging server-side interface, wherein the charging request message contains a uniform resource locator (URL) of a service to be processed; determining corresponding service information comprising user information and service use information of a user according to the URL; acquiring the basic data of a charging scheme corresponding to the user according to the user information; and generating a detailed charging list according to the service use information and the basic data of the charging scheme corresponding to the user. According to the charging method, the interface is designed to be of REST API type, the centralized charging of various services can be realized.